HELP!!! Why is this happening????

I have to make several hundred of these (half sq triangle strips??? i think thats what they are called) and I keep getting a "bow" on the top of the fabric like the picture below. The "bow I am referring to is near the top right corner of the strip in the first pic. Is there is anything I can do to keep this from happening??? I had to do 56~1 3/4x3" rectangles like the second picture and they turned out terrible. Notice how completely off?
I made sure to press and not iron, I set the seam, I hand pressed the steam before hitting with the iron.

okay, think I may have found my problem...pressing my seams the wrong way. Grr, why don't I ever think of these things at the time. Only after it's too far to go back and fix do i realize I did it wrong. My pattern does not indicate which way to press the seams.

I think the problem is in the cutting. You need to make sure the fabric is pressed and folded carefully before you begin. Here's M'Liss Rae Hawley's tips for getting it right:
1.
Fold fabric from selvage to selvage (full width of fabric) or selvage to cut edge (fat quarter).
2.
Hold the fabric in the air and study the drape. Disregard the cut ends, instead, move the selvages from side to side til the fabric is perfectly flat.
3.
Stop. Set the fabric on the cutting mat and make the second fold: selvage to folded edge. If you have a large piece, try to break it down so you can work with a manageable amount.
4.
Place folded fabric on the mat, with the fold facing you. Position your ruler on the right-hand edge of the fabric, so it is perpendicular to the fold.
5.
Trim to square up....
6.
Rotate the mat or the fabric and repeat to trim the opposite edge.

I found these tips very useful when starting out. All is not lost with your wonky blocks, just a bit of a tedious task trimming them all individually before you get piecing.

Hope I explained it clearly......don't give up, it's very pretty fabric and show us how you progress....we love pictures.

Thats right now I remember press to the dark. I am pressing to the light b/c it seams to be holding it's shape better. I thought I had done all the cutting right. I ripped the fabric to help with the straight grain, is that what you are referring to?
I may redo the red and white again, this will be the third time since I sewed the second red square on the wrong way then cut before I realized what I had done. I guess third time is a charm.

Another thing to watch out for, which happens to alot of us (ahem...me!!)--make sure you are carefully stitching an accurate seam all the way to the end, and not looking away beforehand to pick up the next pair to sew. When we do that, the stitching goes wherever it wants to while we look away, and that is usually in the last half inch or so, right where it really needs to be very accurate!

It might help to ease the pressure on the presser foot a little, if your machine allows you to do that. It looks as if the fabric is being pushed out along the bias as you sew. A walking foot might also help to make the fabric feed evenly without distortion.

We act as though comfort and luxury were the chief requirements of life, when all we need to make us really happy is something to be enthusiastic about.
~ Charles Kingsley